Dentifrice



Patented Apr. 22, 1924.

UNITED STATESPATENT OFFICE.

RUDOLPH A. KUEVEIB, OF IOWA CITY, IOWA, ASSIGNO'R TO THE PEPSODENT COMPANY,

OF CHICAGO, ILLINOIS, A

CORPORATION OF ILLINOIS.

DENTIFRICE.

Io Drawing.

To all whom it may-camera.

Be it known that I,,RUDOLPH A. KUE'VER, a citizen of the United States, and a resident of Iowa City, in the county of Johnson and State of Iowa, have invented certain new and useful Improvements in Dentifrices,of which the following is a specification.

This invention relates to dentifrice and has forits object the production of a dentifrice of superior efficiency in operation and which is incapable of injuring the teeth.

As more fully described in a copending application, a dentifrice must be examined from two standpoints-its mechanical action and its chemical action. Considered mechanically its function is largel that of a' polishing agent, and a polis ing agent orms the bulk of the dentifrice. Considered 2 chemically the most desirable dentifrice is one which produces an acid reaction and corres onding beneficial actioninthe mouth. Consi ering the relation of the two, the polishing agent should not interfere with an acid reaction in any way, either by combining with the acid in the dentifrice or by interferin with the resulting desired reactions in t e month.

In the copending application referred to, I have fully descrlbed the salient desirable features of a polishing agent, with respect to inertness, hardness, solubility etc., and have shown that anh'drous ca cium sulphate completely satis es each of these requirements.

Anhydrous calcium sulphate serves as a perfect polishing a nt,it is hard enou h to so serve, yet muc too soft to damage t e 7 Application filed March 8, 1922. Serial No. 542,138.

teeth in any way; it is-soluble so that articles lodge under the gum margins wil be dissolved butinsoluble enough to remainpolishing action is completed,

until after the and it is inert.

In this invention, in combination with anhydrous calcium sulphate I use a relatively large amount of fruit'juices. These serve to stimulate a mark salivary flow which persists long after the teeth are brushed, and this increases salivary flow, completel and rapidly dissolves every particle of tlie polishing agent out of the mouth, so that within a very short time after the teeth are brushed, the polishing agent which stood up to its duty is completely dissolved, and no particle thereof remains to cause even temporary irritation under gum margins or.

elsewhere.

An illustrative embodiment of the invention is given in the following formula:

Parts.

Flavor, a sufiicient quantity.

Of course these proportions may be varied within wide limits.

Having described my claim invention,

A dentifrice comprising acid calcium phosphate and anhydrous calcium sulphate. In witness whereof, I. hereunto subscribe A. D. 1922.

my name this 3rd da of March RUDO PH A. It

UEV 

